On Nov 19, 2008, at 11:15 AM, Dan Crutcher <[EMAIL PROTECTED]> wrote:
> My intention was to have two partitions on the drive. On one of those > partitions I would install Leopard and use that partition when > starting up one of the Intel/Leopard machines; on the other partition > I would install Tiger and use that partition when starting up one of > the PowerPC or any machine that didn't meet Leopard requirements. This will work. > > > That's when I discovered Disk Utilities' different partition schemes, > GUID and Apple Partition Map, and the ramifications of each for > startup disks. From reading their descriptions it sounds like I can > either choose GUID and have a startup disk for Intel machines or Apple > Partition Map and have a startup for PowerPC machines. That is correct. > Then I read in > an online discussion that Apple Partition Map could work as a startup > for either Intel or PowerPC. Does anyone have the lowdown on that, or > know whether it is possible to create a two-partition external drive > that could work as a startup disk for both Intel and PPC machines, > with 10.4.x on one partition and 10.5.x on the other? As far as I know, from reading and from experience, APM formatted partitions will not start up an Intel Mac. > > > Another impediment I ran across: When I insert the Tiger install disk > in my Intel MacBook Pro, intending to install Tiger on my external > drive, it would not allow me to restart the computer and boot up the > install disk, giving me a message saying that "Mac OS X 10.4 cannot be > installed on this machine" that had only a "Quit" button. I don't want > to install 10.4 on that machine, I want to install it on an external > hard drive. How can I do that without being able to boot up the Tiger > install disk? (And yes, I tried doing a restart and holding down the > "C" key -- it just spit the disk out and started up from the internal > HD.) This is also what I have found. You will need to install Tiger onto the disk from a computer that will support that version of Tiger. Boxed versions of the OS sometimes will not start up Macs that normally can use that OS because it may be a later version. So, if your computer requires 10.4.9 and your purchased copy of Tiger is 10.4.2, it may not boot or install. That just means you need to pick an older Mac to do the install. That also means that that install won't boot a newer computer. Best bet is to get the very latest version of each OS and The dual-format-on-one-drive approach is a little complicated, but is quite doable and eminently handy. Nice tutorial here: < http://eshop.macsales.com/Reviews/Framework.cfm?page=Tips/dualboot/dualboot.html > j. -- Jonathan Fletcher FileMaker 9 Certified Developer Project Foreman NewMedia Construction Co. [EMAIL PROTECTED] Instigator The BB&J Network [EMAIL PROTECTED] _______________________________________________ The next Louisville Computer Society meeting will be November 25 at MacAuthority, 128 Breckinridge Lane. Posting address: [email protected] Information: http://www.math.louisville.edu/mailman/listinfo/macgroup
